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Further Investigation of the Specificity of Interactions Between Wild Lactuca spp. and Bremia lactucae Isolates from Lactuca serriola
Author(s) -
Lebeda A.,
Boukema I. W.
Publication year - 1991
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1991.tb00137.x
Subject(s) - biology , lactuca , botany , race (biology)
Specificity of interactions between eight Lactuca species ( L. saligna, L. virosa, L. altaica, L. dregeana, L. perennis, L. tenerrima, L. tatarica, L. viminea ) and two related genera ( Mycelis muralis, Chondrilla juncea ) and seven Bremia lactucae isolates from Lactuca serriola was studied in 96 accessions. The 35 L. saligna accessions gave no evidence for race‐specificity and a non‐host resistance is expected. L. virosa (36 accessions) showed a highly various response. A substantial part of the studied sets expressed a race‐specific resistance. L. altaica (one accession), which is closely related to L. serriola , was susceptible to all isolates used. L. dregeana (2 accessions) showed also a race‐specific response. The accessions of L. perennis (7), L. tatarica (2) and L. viminea (1) were resistant. The susceptibility of L. tenerrima (3 accessions), which is related to L. perennis , is unexpected. In Mycelis muralis (8 accessions) very often a incomplete resistance was observed. Chondrilla juncea (1 accession) was resistant to all isolates used. It can be concluded that the genetic distances between species cannot be used as a prediction for resistance or susceptibility.